Two coupled coils have the following parameters L1 = Ln + Lmi =100 mH, ri = 10 Ohm, L22 = Ln+ Lm2 = 25 mH, 2 = 2.5 Ohm, N1 = 1000 turns, N2 = 500 turns, %3D Ln = 0.1 L11. Ln = 0.1 L2. (a) Develop a T equivalent cireuit with coil 1 as the reference coil. (b) Repeat with coil 2 as the reference coil. Determine the input impedance of the coupled circuits if the applied frequency to coil 1 is 60 Hz with coil 2 (c) open-circuited; (d) short-circuited. Repeat (d) with the current flowing in the magnetizing reactance neglected. 4 A constant 10 v is suddenly applied to coil 1 of the coupled circuits given in Problem 3. Coil 2 is short-circuited. Calculate the steady-state current flowing in each coil.